<template>
  <div class="col-md-4">
    <form class="form-horizontal">
      <div class="form-group">
        <label>用户名</label>
        <input type="text" class="form-control" placeholder="用户名" v-model="name">
      </div>
      <div class="form-group">
        <label>评论内容</label>
        <textarea class="form-control" rows="6" placeholder="评论内容" v-model="content"></textarea>
      </div>
      <div class="form-group">
        <div class="col-sm-offset-2 col-sm-10">
          <button type="button" class="btn btn-default pull-right" @click="add">提交</button>
        </div>
      </div>
    </form>
  </div>
</template>

<script>
    export default {
        name: "Add",
      props: {
        addComment: {   //指定 属性名/属性值的类型/必要性
          type: Function,
          required: true
        }
      },
      data() {
        return {
          name: '',
          content: ''
        }
      },
      methods: {
        add(){
          //1. 检查输入的合法性
          const name = this.name.trim();
          const content = this.content.trim();
          if (!name || !content){
            alert('姓名或者内容为空');
            return false;
          }
          //2. 根据输入的数据， 封装成的comment对象
          const comment = {
            name,
            content
          };
          //3. 添加到comments中
          this.addComment(comment);
          //4.清除输入
          this.name = '';
          this.content = '';
        }
      }
    }
</script>

<style scoped>

</style>
